public void Surface2D_ctorFromBox_surfOK()
{
initSurf();
var testPt = new Vector3(0, 0, 0);
var surfPt = surf.GetPointAt(testPt);
double distance = surfPt.Position.DistanceTo(testPt);
Assert.AreEqual(0, distance, .001);
var surfPtList = surf.GetAllPoints();
int ptCount = surfPtList.Count;
Assert.AreEqual(160801, ptCount);
}